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Microchip Technology AT49LV002-90VI
- Part No.:
- AT49LV002-90VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49LV002-90VI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,260
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Product details
Overview
AT49LV002-90VI from Microchip Technology (formerly Atmel) is a 2 Mbit (256K × 8) single-supply 3.0–3.6 V in-system reprogrammable Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It delivers 70 ns read access time, 10-second chip erase, byte-programmable operation (30 µs/byte typical), and hardware data protection - enabling secure boot code retention in industrial control firmware updates.
For engineers reviewing the AT49LV002-90VI datasheet, AT49LV002-90VI pinout, AT49LV002-90VI application, or AT49LV002-90VI equivalent, key selection criteria include its industrial temperature range (−40°C to +85°C), sector-protected boot block (16K bytes), low-power CMOS standby current (50 µA), and compatibility with standard microprocessor bus timing without high-voltage programming signals.
Technical Context
The AT49LV002-90VI implements a sector-architected Flash array with one 16K-byte boot block (address 00000H–03FFFH), two 8K-byte parameter blocks, and two main memory blocks (96K and 128K bytes). Its command-set-driven operation uses standard CE/OE/WE controls and supports software-controlled chip erase, sector erase, and byte programming via six-cycle command sequences.
Hardware protection includes VCC sense (program inhibited below 1.8 V), noise filtering on WE/CE (<15 ns pulses ignored), and dual-line control (CE+OE) to prevent bus contention during read. DATA polling (I/O7 complement) and toggle-bit (I/O6) mechanisms provide reliable end-of-program/erase detection without external timing constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8 bits) - supports full firmware image storage for 8-bit MCUs with minimal address decoding. |
| Read Access Time | 90 ns - ensures compatibility with 11 MHz system buses without wait states. |
| Supply Voltage | 3.0 V to 3.6 V - operates directly from regulated 3.3 V rails, eliminating level-shifting requirements. |
| Byte Programming Time | 30 µs typical - enables rapid field updates of configuration parameters or calibration data. |
| Erase Cycle Time | 10 seconds max (chip erase) - allows predictable firmware update windows in production test and field service. |
| Endurance | 10,000 write/erase cycles - validated for long-term use in industrial logging and parameter storage applications. |
| Standby Current | 50 µA CMOS - reduces power budget in battery-backed or energy-sensitive embedded nodes. |
Pinout & Package
AT49LV002-90VI is packaged in a 32-lead VSOP (8 × 14 mm), pin-compatible with TSOP and PLCC variants. All pins match the industry-standard 32-pin Flash memory footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A16 used for byte-level access within sectors. |
| I/O0–I/O7 | Data Inputs/Outputs | Bi-directional 8-bit data bus; supports true read-modify-write sequences and DATA polling on I/O7. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; enables bus isolation. |
| OE | Output Enable | Active-low output control; used with CE to manage bus contention and reduce read power consumption. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command cycle timing. |
| RESET | Reset Input | Active-low reset; halts ongoing program/erase and forces high-Z outputs; 12 V override enables boot block reprogramming. |
| VCC | Power Supply | 3.0–3.6 V supply; internal regulation ensures stable programming voltage across operating range. |
| GND | Ground | Reference for all I/O and internal logic; decoupling required within 10 mm of VCC pin. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte protected region (00000H–03FFFH) prevents accidental overwrite of bootloader code; lockout enabled via 6-cycle command sequence. |
| Hardware Data Protection | VCC sense, noise filtering, and CE/OE/WE interlock prevent spurious writes during power transients or EMI events. |
| DATA Polling & Toggle Bit | I/O7 complement and I/O6 toggling provide real-time, bus-compatible status feedback without requiring external clocks or timers. |
| Sector Erase Flexibility | Independent erasure of parameter blocks (8K each) and main memory blocks (96K/128K) enables selective firmware updates without full chip erase. |
| Single 3.3 V Operation | No 5 V or 12 V programming supplies needed; eliminates external charge pumps and simplifies PCB power design. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing field-upgradable ladder logic and I/O mapping tables in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with sector-locked boot block ensuring safe bootloader integrity during over-the-air updates. Use Value: Enables certified firmware revisions without hardware intervention; 10,000-cycle endurance supports >5 years of scheduled maintenance cycles. |
Use Scenario: Retaining calibrated sensor offsets, user preferences, and regulatory-compliant device settings in portable diagnostic equipment. IC Role / Device Role / Timing Role: Parameter memory with hardware write protection and low standby current for battery-operated devices. Use Value: 50 µA CMOS standby current extends battery life; boot block lockout prevents corruption of FDA-mandated calibration constants. |
| Automotive Body Control Module | Networking Equipment Bootloader |
Use Scenario: Holding vehicle-specific configuration data (e.g., door lock behavior, lighting profiles) in body control units subjected to wide thermal cycling. IC Role / Device Role / Timing Role: Industrial-grade (−40°C to +85°C) Flash memory interfaced directly to 8-bit MCU address/data bus. Use Value: 90 ns access time meets real-time response requirements; 10-second erase supports fast dealership reprogramming. |
Use Scenario: Hosting secure, authenticated bootloader code in managed Ethernet switches requiring tamper-resistant firmware initialization. IC Role / Device Role / Timing Role: Boot block–protected Flash providing trusted execution root for secure boot chain verification. Use Value: 12 V RESET override allows recovery from corrupted boot code; DATA polling ensures deterministic boot sequence timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF020-90-4C-NHE | 3.0–3.6 V supply, 90 ns access, 2 Mbit density, but lacks RESET-based boot block override and uses different command set. | Requires modified firmware driver for erase/program commands; no 12 V boot unlock capability. | Select when existing SST39VF driver stack is in place and boot block override is not required. |
| MX29LV002CTTI-90G | Same 2 Mbit density and 90 ns speed, but boot block size is 8K bytes (not 16K) and sector architecture differs (32K uniform blocks). | Less granular parameter block management; incompatible sector address map for legacy AT49LV002 firmware. | Select for new designs prioritizing uniform block erase and broader distributor availability. |
Compared with SST39VF020-90-4C-NHE and MX29LV002CTTI-90G, the AT49LV002-90VI offers unique 16K boot block lockout with 12 V RESET override - critical for field-recoverable bootloader implementations - and native compatibility with Atmel's established command protocol across legacy industrial platforms.
Availability
AT49LV002-90VI is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, automotive body electronics, and networking infrastructure requiring stable component supply across extended lifecycle commitments.
Supply support for AT49LV002-90VI includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology acquired Atmel in 2016 and maintains full technical and manufacturing continuity for the AT49LV series. The company specializes in microcontrollers, analog, and nonvolatile memory solutions for industrial and automotive markets.
The AT49LV002-90VI belongs to Atmel's legacy low-voltage Flash memory product line, designed specifically for in-system reprogrammability in resource-constrained 8-bit embedded systems requiring robust, sector-protected code storage.
FAQ
What is the operating temperature range for the AT49LV002-90VI?
The AT49LV002-90VI is rated for industrial operation from −40°C to +85°C. This range is confirmed in the ordering information table for the "-90VI" suffix and applies to all DC and AC specifications including read access time (90 ns), active current (25 mA), and standby current (50 µA). The device meets this specification under continuous bias conditions per the Absolute Maximum Ratings table.
Does the AT49LV002-90VI support boot block protection, and how is it enabled?
Yes, the AT49LV002-90VI includes a 16K-byte boot block (00000H–03FFFH) with programmable lockout. Protection is enabled by executing a six-cycle command sequence: load AAH to 5555H, 55H to 2AAAH, 80H to 5555H, then AAH/55H/40H to 5555H/2AAAH/5555H. Once activated, the boot block cannot be erased or programmed at ≤5.5 V - only a 12 V pulse on RESET permits override.
What package type is used for the AT49LV002-90VI, and what are its dimensions?
The AT49LV002-90VI uses a 32-lead Very Small Outline Package (VSOP) with dimensions 8 mm × 14 mm. This is explicitly listed in the AT49LV002 Ordering Information table under "Package Type 32V". The VSOP footprint is pin-compatible with TSOP (32T) and PLCC (32J) variants, enabling layout reuse across form factors.
How does the AT49LV002-90VI indicate completion of a byte programming cycle?
The AT49LV002-90VI provides two hardware methods: DATA polling and Toggle Bit detection. During programming, reading the last written address returns the complement of the data on I/O7; when complete, true data appears. Alternatively, I/O6 toggles between 0 and 1 during programming and stops toggling upon completion - both methods require no external clock or timeout logic.
Is the AT49LV002-90VI pin-compatible with other members of the AT49BV/LV002 family?
Yes, the AT49LV002-90VI shares identical pinout, signal definitions, and timing across all AT49BV/LV002(N)(T) variants - including AT49BV002, AT49LV002N, and AT49LV002T. Differences are limited to voltage range (BV vs LV), boot block address mapping (standard vs T-version), and package marking - all electrically interoperable on the same PCB footprint.
AT49LV002-90VI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.488", 12.40mm Width)
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 90 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT49LV002-90VI FAQ
1.How can I place an order for AT49LV002-90VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV002-90VI on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT49LV002-90VI reliable?
The price and inventory of AT49LV002-90VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV002-90VI is usually 5 days.
3.What payment methods are accepted for AT49LV002-90VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV002-90VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV002-90VI?
AT49LV002-90VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV002-90VI order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT49LV002-90VI?
For technical support, including AT49LV002-90VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV002-90VI requirements.
6.How does Aetrix verify that AT49LV002-90VI is sourced from the original manufacturer or authorized distributors?
All AT49LV002-90VI products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT49LV002-90VI meets industry standards.
7.What is the process for return or replacement of AT49LV002-90VI?
All AT49LV002-90VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV002-90VI, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT49LV002-90VI part is unused and in its original packaging.
Return procedure for AT49LV002-90VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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